Instrument holder



FIG. 1. Is a perspective view of my instrument holder, with the dotted line showing therein in FIGS. 2 and 6 being for illustrative purposes only and not forming part of the claimed design;

FIG. 2. Is a front view thereof;

FIG. 3. Is a top view thereof;

FIG. 4. Is a right side elevational view thereof;

FIG. 5. Is a left side elevational view thereof;

FIG. 6. Is a rear view thereof; and,

FIG. 7. Is a bottom view thereof. 

The ornamental design for a instrument holder, as shown and described herein. 